This is yet another learning/passion project. Similar to libarr. So don't think too much of this, nor use it as your actual shell at all (if anyone ever does this and daily drives this, I'll buy you a beer for sure).
Currently, this was built and written on an Arch Linux system, using the 6.12.7-zen kernel. So I guess it supports Linux.
Now, I doubt it would necessarily break on Mac OS. Its possible it might work.
Windows, lol.